Lilly bought two pieces of land. The dimensions of the two pieces of land are 50
feet X 40 feet and 75 feet X 50 feet.
Calculate the total area of both pieces of
land.

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g